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Faulty Valve


By KBL781 - Posted on 22 February 2011

TitleFaulty Valve
Publication TypeCase Study
Year of Publication2000
AuthorsHarris, Charles E., Pritchard Michael S., and Rabins Michael J.
PublisherWadsworth
Publication Languageeng
KeywordsAcknowledging , biomedical engineering , product , Product and Consumer Safety , product liability , quality , safety
Abstract

Describes the case of the Shiley heart valve. In the late 1970's Shiley Inc. came up with a new model of an artificial heart valve that allowed better blood flow than other models, thereby reducing the risk of blood clots. Unfortunately, the valves sometime became cracked, and during the inspection process these cracked valves either had to be discarded or rewelded. However, after over 300 deaths occurred due to cracked valves, it was discovered that the practice of rewelding did not always stop the cracking from happening, and in some cases cracked valves were not even rewelded but the cracks were only polished over.

Notes

Case from Harris, Charles, Michael Pritchard and Michael Rabins. Engineering Ethics: Concepts and Cases. Belmont, CA: Wadsworth Publishing Company, 2000. Available from the Wadsworth website.

URLClick here for the document
Abbreviated Case NameFaulty Valve
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